Quite interesting read, but very difficult to draw conclusions:

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Traffic Boosts Organic Rankings? New Research Reveals Some Interesting Facts
The immediate effect that we saw on closer analysis was the impressive (if you look at the chart below) spike in traffic around the day it was picked up by Reddit (January 5th). Within 1 day, the traffic on our blog hit 20 000 visits, an impressive feat by any standards…

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This post was first made on the Richard Hearne Google+ profile.